Method of heading sheet-metal cans.



B. ADRIANOE. METHOD OF HEADING SHEET METAL SANS. 'APPLIOATIQN FILED JULY 22, 1907,

939,197, Patented Nov. 9, 1909.

INVENTOB f 8% i Z 5 ATTORNEXS L BENJAMIN ADRIANG'E, OF BROGKLYN, NEW GRK MFEEOD OF HEAiDIIfiIG SEEETJIETKL Specification of Letters Patent.

'Patented Nov. 9, 1909.

Application filedJ-uly ?2, 1907. Serial No. 381=,96 'i.

To all whom 'it may concern:

Be it known that I, BENJAMIN ADRIANGE, a citizen of the United States, residin in Brooklyn, Brooklyn borough, State of hew York, have invented a certain new and useful Improvement in Methods of Heading Sheet-Metal Cans; and I do hereby declare the following to be a full, clear, and exact. description of the invention, such as will enable others skilled in the art to which it a ertains to make and use the same, reference being had to the accoin anying drawings, and to numerals of re erence marked thereon, which form a part of this specification.

This invention contemplates effecting a preliminary connection between the head and the body of a sheet-metal. can before said parts are permanently united by a can heading or seaming machine. Thus any shifting of the head before and during the seaming operation is avoided, spilling is prevented, and the manipulation of the can durin the seaming operation is facilitated.

Re erring to the accompanying drawing,

Figure 1 is a plan view of a can headed according to my invention, showing the parts before the seam is formed; Fig. 2 is an enlarged cross-section on line w-a; of Fig. 1; Fig. 3 is a plan view of a can after the continuous seaming or turning-over is com pletc; Fig. shows, in plan, a clenching roll, partly in section; Fig. 5 is a sid view of the clenching roll in Fig. t; Fi 6 shows the first operation seaming rol in plain' partly in section; Fig. 7 shows the roll in I Fig. 5 in side elevation; and, Fig.8 is a sectional view on the line y 1 of Fig. 3.

The can-body a is flanged, as at 5; while the countersunk cover or headti has a flange 7, which is supported upon flange 5 and projects over the same, as at 8. In order to effect the temporary connection desired the flange 7 is clenched or bent at suitable points, so as to there become interlocked with flange 5, Fig. 1. The points 9 at which the clenching operation takes place should be spaced or distanced from each other, the flangesections between the clenched points retaining their original shape.

It will be understood by those familiar with i is art that the seaming operation is pe'rfc". by one or more tools 10, usually rolls. each having an acting face which presents a convex curve 11 longitudinallythere-L of and a concave curve 12 transversely thereof. I have discovered that the clenchin tools (see rolls 13, Figs. 4: and 5) shoul have an acting face presenting the curves 14 and 15 substantially identical to the respective curvesll and 12 of the seaming tools; if the clenching and seaming tools are substantially identical in this respect, when: the seaming tools (which preface their operation of continuously turning-over the flanges 5 and 7 as hereinafter stated by first presenting themselves in the recesses formed by the clenching at 9) begin the seaming or tnrningover operation, they do so under perfect. conditions of accurate fit,

and position to the portions of the metal first affected bythem, so that the leakage in the can seam which has very frequentlymanifested itself where no re ard to this expe- -dient is had is fully avoi'ed. Thus, in Fig.

1 the clenched points 9, produced by the rolls 13, present in plan," Fig. 1, concave curves 16 which have the same radius as that of the curve 11 of roll 10, and in section, Fig. 2,

tion) of two rolls, the principal function I of thesecond of which is to follow the first and finish and perfect the seam.

After the cover has been temporarily secared to the ean body by the clenching rolls in the manner above indicated, the can is sub ected to the action of the seaming rolls, which turn down both flanges and. 7 along lthe entire circumference of the can, including the clenched portions thereof ,leaving the can substantially as itappears in Fig. 3. In the seam thus formed the edge of the cover flange 7 is folded around the flange 5, so as to be brought sidewise against the can body and be interposed between such body and its tinned-down flange. There is thus formed a continuous seam or lock-joint- "18, ir-i 3 and 8, which forms a permanent con nection with the can and its cover.

The drawing shows the invention applied to a'square can clenched at two uniformly spaced points; but it is evident that the number and relative position of such points may be cln'tngcd and the invention applied, to cans of various shapes, as well as the final configuration of the seam varied according it is desire to form.

It may be remarked that the concave curves 12 and 15presented by cross-sections of the grooves of the rolls 10 and 13, re-

' spectively, and the convex curves 17 presented by cross-sections of the clenched portions of the can fianges,'all have identical radii; likewise, the convex'curves 11 and. 14

presented by sections of the rolls 10 and 13, respectively, each in the plane ofthe roll groove, and the concave curves 16 revealed in the plan of the clenchedportions of the can flanges, all have identical radii. In Fig. 5 the curve 15 is exaggerated to present conformity with the curve 17 which it is made to have the appearance of having just formed owing to the relative approximation of these two figures on the drawing.

L will be understood that the clenching tools in'practice form parts of one organism and the seaming tools parts of another distinct organism, and that'the can is first presented to the clenching means and then removed therefrom and subjected to the action of the seaming means.

Having presented in a separate. application executed on even date herewith a claim for. the method of heading sheet metal cans which comprises the foregoing steps and the further step of turning-down both flanges along their entire circumference, I make no claim thereto herein; but

What I do claim is:

1. The method of heading sheet-metal cans which consists infplacmg a flanged cover on a flan ed can-body, clenching a relatively limited portion ofthe cover-flange to the body-flange by means of a tool having an acting face Whose longitudinal section presents substantially the same contour as that of the acting face of the seaming tool which is 'to follow the clenching tool in the operation of completing the. heading, and then causing said seaming tool to fold-over saidflanges,:introducin said seaming tool first at the clenching pbint as a starting point, substantially as described. 7

2. The method of" heading sheet-metal cans which consists in placing a flanged cover on a flanged can-body, clenching a relatively limited portion of the cover-flange tothe body-flange by means of a tool having a grooved acting face whose"cross;section' presents substantially the same contour as the grooved acting face of the seaming tool,

which is to follow the clenching too] in the operation.oflcompleting the heading, and T t-hen' causing said seaming tool having a 

